CVE-2025-15559

CVSS Score & Metrics

Base Score

9.8 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H                                    

Vulnerability Description

An unauthenticated attacker can inject OS commands when calling a server API endpoint in NesterSoft WorkTime. The server API call to generate and download the WorkTime client from the WorkTime server is vulnerable in the “guid” parameter. This allows an attacker to execute arbitrary commands on the WorkTime server as NT Authority\SYSTEM with the highest privileges. Attackers are able to access or manipulate sensitive data and take over the whole server.

Vulnerability Details

Published Date

February 19, 2026

Last Modified

February 23, 2026

CWE ID

CWE-78

Source

NVD

Vendor

NesterSoft Inc.

Product

WorkTime (on-prem/cloud)

External References

https://r.sec-consult.com/worktime

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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